Transcript Submitted by the Chair of the WLTP IWG Informal document GRPE-69-20 69th GRPE, 5-6 June Agenda item 3(a) Status report of the WLTP Informal Working Group Report to the 69th GRPE.

Submitted by the Chair of the
WLTP IWG
Informal document GRPE-69-20
69th
GRPE,
5-6
June
Agenda item 3(a)
2014
Status report
of the
WLTP Informal Working Group
Report to the 69th GRPE session
by Stephan Redmann
WLTP IWG Meetings since last GRPE
26-28 March 2014
6th WLTP IWG, Vienna, Austria
 Minutes WLTP-06-33-rev1e
4th June 2014
7th WLTP IWG, Geneva, Switzerland
 Minutes WLTP-07-18e
Continously
Task force meetings / telcos
On-going work Phase 1B
Open issues list: WLTP-07-03e
Key issues:
Subgroup EV
Utility Factors, phase specific calculation formula,
shortened test procedure
Cycle / Process
Downscaling, gearshifting , number of tests
Road & Dyno Load Determination
Windtunnel method, torque meter method, on-board
anemometry, default running resistances
General
Normalization procedures, drafting
Validations/ Round Robin exercise
Normalization procedures
EU activity:
Correction algorithms for variations in the WLTP testing
1) Chassis dynamometer test
2) Road load determination
(see intermediate report WLTP-07-05e)
IWG #7:
Japan and India confirmed interest in harmonisation of procedures in the gtr
 Conclusion / further steps:
- EC will lead WLTP task force
- Interested CPs and other stakeholders are invited to participate
- Final report available end of July 2014
- Clarification of technical questions until September 2014
- Task Force will prepare a proposal for IWG #8
(package of procedures, work plan, incl. validation plan, if necessary)
Coasting (sailing) (WLTP-07-13-rev1e)
Japan:
EU:
US:
India:
Concerns, currently no support.
Concerns. No strong interest to harmonize procedure,
(EU applies eco-onnovations concept as alternative), but no
objection to continue work.
Derivation of usage factors critical.
Benefits of technology should not be wasted.
Support to continue work.
 Conclusion:
TF continue its work and try to address the concerns within the following frame:
1)
2)
3)
No speed trace modification concept, systematic speed trace deviations
shall be avoided
 Post-processing approach as basis, Bosch proposal should be
the starting point .
Focus on technical aspects first  define procedure
Usage factors might be regional option.
High risk that Task Force won‘t be able to provide an acceptable proposal!
Additional temperature correction test (ATCT):
IWG #6:
- India and Japan objected to implement the test in the gtr
- EC confirmed that this test will become a regional requirement in Europe
 Conclusion:
IWG closed issue, placeholder will be removed from gtr
Corrigendum gtr no. 15
Drafting Coordinator reported many necessary corrections to gtr no. 15
(see current gtr draft WLTP-07-04e)
 Proposal:
No Corrigendum, introduction of all corrections together with other
amendments at the end of phase 1b
WLTP Phase 1b Roadmap
2014
2015
2016
gtr informal
document
WLTP
5
6
7
Fix organization,
responsibilities
and time schedule
Round Robin
8
9
10
11
169
168
73
72
71
70
69
68
GRPE
Slight modification
Phase2 ToR
WP.29
167
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gtr formal
document
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Phase2
Next WLTP IWG meetings
2014: Oct./Nov.
- IWG #8, India
2015: January
- IWG #9, Geneva (GRPE)
April
- IWG #10, Sweden
June
- IWG #11, Geneva (GRPE)
September
- IWG #12, Japan